| dc.description.abstract | The biological detection using non-invasive way in medicine is becoming an important detected method, so spectral detection began to be applied in medical disease research. The pathological changes of human skin are easy to be misjudged owing to that the symptoms are too similar, so we want to use the spectrum at different angles to study the disease diagnosis.
In order to obtain more spectral information to achieve more exact judgments, we will research the spectral structure at different angles. To realize this target, we set up a system to measure spectrum, which collects the spectral information of multi-angle in one time, and we do not concern about that it will take too long to measure multi-angle spectral information and causing inaccurate.
First of all, we take a Taiwanese bronze scarab as a sample and observe the result of this sample in multi-angle spectral measurement. As the received reflection angle is larger, the peaks of the spectrum gradually move to the short wavelength. 0 degree corresponding to the color is yellow and 60 degree corresponding to the color is green. Next, we research the spectrum information of human skin. In different angles spectrum, we analyze the skin spectrum with melanin, hemoglobin and oxyhemoglobin concentration ratio. As the received reflection angle is larger, the concentration decreases. And then we use another method to analyze the skin scattered light through the system with geometrical characteristics. According to this method, we find the difference in the contribution of absorption and scattering to the reflection spectrum in the skin tissue and the symmetry of the angle in positive and negative.
| en_US |